John, Ronald Ora. <br/><br/>
Segregated class placement vs heterogeneous class placement of emotionally and perceptually handicapped children / 
by Ronald Ora John. 
 - San Francisco :  R and E Research Associates,  1975. 
 - vii, 78 p. ;  29 cm. 
<br/><br/> Reprint of the author's thesis, Utah State University, 1967. 
<br/><br/>Bibliography : p. 56-62. 
<br/><br/><label>ISBN: </label>0882473158 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mentally handicapped children--Education.<br/>Ability grouping in education.